posix_spawnattr_getschedpolicy, posix_spawnattr_setschedpolicy - get and set the spawn-schedpolicy attribute of a spawn attributes object (ADVANCED REALTIME)
[SPN PS] #include <spawn.h>
int posix_spawnattr_getschedpolicy(const posix_spawnattr_t
*restrict attr, int *restrict schedpolicy);
int posix_spawnattr_setschedpolicy(posix_spawnattr_t *attr,
The posix_spawnattr_getschedpolicy() function shall obtain the value of the spawn-schedpolicy attribute from the attributes object referenced by attr.
The posix_spawnattr_setschedpolicy() function shall set the spawn-schedpolicy attribute in an initialized attributes object referenced by attr.
The spawn-schedpolicy attribute represents the scheduling policy to be assigned to the new process image in a spawn operation (if POSIX_SPAWN_SETSCHEDULER is set in the spawn-flags attribute). The default value of this attribute is unspecified.
Upon successful completion, posix_spawnattr_getschedpolicy() shall return zero and store the value of the spawn-schedpolicy attribute of attr into the object referenced by the schedpolicy parameter; otherwise, an error number shall be returned to indicate the error.
Upon successful completion, posix_spawnattr_setschedpolicy() shall return zero; otherwise, an error number shall be returned to indicate the error.
These functions may fail if:
- The value specified by attr is invalid.
The posix_spawnattr_setschedpolicy() function may fail if:
- The value of the attribute being set is not valid.
These functions are part of the Spawn and Process Scheduling options and need not be provided on all implementations.
posix_spawn , posix_spawnattr_destroy , posix_spawnattr_getsigdefault , posix_spawnattr_getflags , posix_spawnattr_getpgroup , posix_spawnattr_getschedparam , posix_spawnattr_getsigmask
XBD <sched.h> , <spawn.h>
First released in Issue 6. Derived from IEEE Std 1003.1d-1999.
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